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| Mirrors > Home > ILE Home > Th. List > syl5ibrcom | GIF version | ||
| Description: A mixed syllogism inference. (Contributed by NM, 20-Jun-2007.) |
| Ref | Expression |
|---|---|
| imbitrrid.1 | ⊢ (𝜑 → 𝜃) |
| imbitrrid.2 | ⊢ (𝜒 → (𝜓 ↔ 𝜃)) |
| Ref | Expression |
|---|---|
| syl5ibrcom | ⊢ (𝜑 → (𝜒 → 𝜓)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | imbitrrid.1 | . . 3 ⊢ (𝜑 → 𝜃) | |
| 2 | imbitrrid.2 | . . 3 ⊢ (𝜒 → (𝜓 ↔ 𝜃)) | |
| 3 | 1, 2 | imbitrrid 156 | . 2 ⊢ (𝜒 → (𝜑 → 𝜓)) |
| 4 | 3 | com12 30 | 1 ⊢ (𝜑 → (𝜒 → 𝜓)) |
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